Improvement in water-wheels



Pq w. "YARRELL Water Wheel.

No. 101,402. Patented March 29, 1870.

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@met @Wina VPIERCE W. YARRELL, OF LITTLETON, NORTH CAROLINA.

.Letters Patent No. 101,402, dated March 29, 1870.

IMPROVEMENT IN WATER-WHEELS.

The Schedule referred to in these Letters Patent and making of the same.

To all ywhom it may concern: I

Be it known that LPIEROE W. YARRLL, of Littleton, in the county ofHalifax and State'of North Carolinahave invented a new and usefulImproved Water-Wheel; and I do herebyv declare the following to be aclear and exact description thereof, sucient to enable Vothers skilledin the art to which my invention appertains to make and use the same,reference beinghad to the accompanying drawings making part of thisspecification, in which- Figure l is a longitudinal section of the box,casing, and wheel.

Figure 2 is a front view of the device for raising and lowering theband-gate.

Figure 3 is a top view, and

Figure 4 a side view of the water-wheel.

Similar letters of reference indicate like parts in all the figures.

My invention consists in a device for raising the band-gate to admitwater to the wheel by means of a rack and pinion, and groove in thewheel-casing.

My invention also consists in the arrangement of the 'curved lbuckets`of the water-wheel opposite each other, in such a manner that theupward and downward pressure of the water on the buckets tend toconnterbalance each other, thus relieving the pressure of the shaft ofthe wheel on its bearing.

In the accompanying drawings- A is the box, penstock, or chute in whichthe water-wheel and casing are situated, and may be provided with valvesor gates B B, for the water to escape from the turbined wheel afteroperating upon it.

Gis the vertical shaft of the water-wheel D, and

I has its bearing in the bottom of the box, penstock, or

per series of buckets for the escape of water, and similar spaces forthe same object between the lower series of buckets. l

The water from the band-gate being admitted on the smooth surface S ofthe wheel, between the inner points of the upper andlower series ofbuckets, presses upward and downward upon the curved surfaces of theupper and lower series of buckets, thus operating the wheel, and, at thesamel time, relieving the shaft O from pressure on its bearing, andenabling the waterwheel to be operated with less power.

K is the upper part of' the casing or cap which surrounds the upper setof buckets', and having a perforation, L, at its center, through whichthe shaft O passes, and also lugs M. M, provided with bolts, by means ofwhich thecasing is attached to that part of the pen-stock, door, orcasing surrounding the lower set of buckets. y

N is the band-gate surrounding the casing, and provided with pins orprojections a a sliding in inclined grooves b b made in the casing.

e is a curved rack on the band-gate N, into which meshes the pinion d onthe vertical shaft g. By turning the shaft g the band-gate is securelyclosed or opened, thereby admitting a sufficient quantity of water tooperate the wheel.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

1. The wheel D, having the buckets I arranged in pairs upon itsperiphery to produce an equilibrium of pressure, substantially asdescribed.

2. The hand-gate N, made to rise and fall by rotation through the mediumof the rack e, pinion d, rod c, grooves b, and pins ai, applied andoperating substantially as described.

To the above I have signed my name this 27 th day of January, 1870.

PIERCE W. YARRELL.

Witnesses:

JOHN A. WmDERsnEIM, W. H. FINCKEL.

